I Arrived at level 14 of the Alien Campaign, but its freaking impossible. In my best try i've lost 27 to 30, 26 of whick kills was mine, my teammates are crap and retard, they do score like 0 - 15 1 - 20 thats why i lose, i'm enraging trollollol
use cloak and go behind humans with the holy grail, only go for raze if u can shoot around a corner with the ice cannon, or u have double damage, also stay to the high ground on jumpers and go back and forth, and have patience ;P